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    <title>chfact</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>chfact</b> -  sparse Cholesky factorization</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>spcho=chfact(A)  </tt>
      </dd>
    </dl>
    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>A</b>
        </tt>: square symmetric positive sparse matrix</li>
      <li>
        <tt>
          <b>spcho</b>
        </tt>: list containing the Cholesky factors in coded form</li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
      <tt>
        <b>spcho=chfact(A)</b>
      </tt> computes the sparse Cholesky factors of sparse
    matrix <tt>
        <b>A</b>
      </tt>, assumed symmetric positive definite.
    This function is based on the Ng-Peyton programs (ORNL). See the
    Fortran programs for a complete description of the variables in
    <tt>
        <b>spcho</b>
      </tt>. This function is to be used with <tt>
        <b>chsolve</b>
      </tt>.</p>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="chsolve.htm">
        <tt>
          <b>chsolve</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="../elementary/sparse.htm">
        <tt>
          <b>sparse</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="lufact.htm">
        <tt>
          <b>lufact</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="luget.htm">
        <tt>
          <b>luget</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="spchol.htm">
        <tt>
          <b>spchol</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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